Free tool
Kingdom Key Prop Scaling Calculator
Scale Sora's Kingdom Key from Kingdom Hearts to your exact height. Canonical overall length is 105 cm (3'5"). Enter your height below to get every dimension proportionally adjusted for your build.
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Frequently asked questions
How big should a Kingdom Key cosplay prop be?
The canonical Kingdom Key overall length is 105 cm (3'5"), based on Sora at 160 cm (5'3"). For a cosplayer who is 165 cm, proportional scaling brings the overall length to about 108 cm. Use the calculator above to get exact dimensions for your height.
What material should I use for a Kingdom Key cosplay?
At 105 cm canonical length, the Kingdom Key is a large prop. EVA foam is the best choice for builds this size. It keeps the weight under 2.5 kg, is convention-safe, and shapes easily with a heat gun. Use a PVC pipe or wooden dowel core for rigidity, and seal with Plasti Dip or contact cement before painting.
Is the Kingdom Key from Kingdom Hearts allowed at conventions?
Yes, as long as it meets your convention's prop policy. Most cons allow props up to 183 cm (6 feet) and require peace-bonding. The Kingdom Key at canonical size is 105 cm, well within limits for most cosplayers. Build it from foam or similar lightweight material (no metal or sharp edges), and check your specific convention's rules before attending.